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Other Operating Expense (Income), Net (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 28, 2025	Sep. 29, 2024	Oct. 01, 2023
Restructuring Cost and Reserve [Line Items]
Operating restaurant impairment charges	$ 4,384	$ 8,008	$ 4,569
Jack in the Box
Restructuring Cost and Reserve [Line Items]
Operating restaurant impairment charges	1,900	5,400
Del Taco
Restructuring Cost and Reserve [Line Items]
Operating restaurant impairment charges	$ 2,400	$ 2,600	$ 4,400

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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